Joseph jaitch



(No Model.)

J. JAUOH. CENTRAL DRAFT LAMP.

No. 412,958. Patented Oct. 15, 1889.

N, PETERS, Phfllb-l'rlhcgmphltr. Washingim D. C,

UNTTED STATES PATENT Orrtcn.

JOSEPH JAUCII, OF MERIDEN, CONNECTICUT, ASSIGNOR TO THE BRADLEY & HUBBARD MANUFACTURING COMPANY, OF SAME PLACE.

CENTRAL-DRAFT LAMP.

SPECIFICATION forming part of Letters Patent No. 412,958, dated October 15, 1889.

Serial No. 308,135. (No model.)

To all whom it may concern:

Be it known that I, JOSEPH JAUOH, of Meriden, in the county of New Haven and State of Connecticut, have invented a new Improvement in Central-Draft Lamps; and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in-

Figure l, a vertical central section of a central-draft tube, showing side view of the distributor half in vertical section; Fig. 2, a transverse section on line a: x of Fig. 1; Figs. 3 and 4:, modifications.

This invention relates to an improvement in that class of lamps in which the wick is of tubular shape and arranged in the lamp around a central tube, through which air is supplied to the interior of the tubular flame, commonly called centraldraft lamps, and particularly to that class in which the air passing through the central tube enters a chamber above the end of the wick-tube within the flame, the said chamber being perforated around its sides to distribute the air and direct it into the flame.

The object of the invention is to make an equal distribution of air and to properly direct it into the flame, so that the most perfect combustion may be produced; and it consists in the construction, as hereinafter described, and particularly recited in the claims.

A represents the central tube, which may be of the usual form. Around this tube the wick B is arranged in the usual manner. I do not illustrate the fount or the burner, as

' their construction is immaterial to this invention. WVithin the upper end of the tube a sleeve 0 is arranged, but so as to slide freely up and down therein. The upper end of the sleeve is turned outward, so as to rest upon the upper end of the central tube A. lVithin this sleeve C, and attached thereto, is a concentric conical tube D. It is secured to the sleeve A by its lower end, and at that end is of substantially the diameter of the sleeve. This tube D extends upward to substantially the upper end of the sleeve, and its sides are perforated so as to permit air to pass from the central tube into the space E between the sleeve and the said conical tube D. To the upper end of the conical tube D the air-distributer is attached. This consists of a body F and a top or crown Gr. The body F is enlarged somewhat from the diameter of the upper end of the tube D, the body at its junction with the tube presenting a downward convex surface H. The side of the body from this convex portion upward is substantially straight. Its upper end is curved outward to form an annular flange I of somewhat larger diameter than the diameter of the central tube, and so as to overhang the wick. The vertical side of the body Fis perforated, as shown, and through the convex under surface H an annular series of perforations Z) is made, this series I) of perforations being somewhat above the upper end of the wick, but substantially directed thereon. The crown G projects above the flange I and recedes therefrom, and is perforated, as represented. Preferably the side of the crown is made in a series of offsets, forming a series of annular shoulders, each presenting a vertical and horizontal surface, the said vertical and horizontal surfaces being perforated. This peculiar construction of the crown is the subject of another application. Air enters through the central tube. A portion of it passes through the perforated sides of the conical tube D into the surrounding space, and thence is conducted to the flame. The remainder of the air passes up into the 8 5 distributor. The jets are directed through the series Z) of perforations in the convex surface below directly into the base of the flame. These jets meet the rising current from the outside of the conical tube and direct a por- 0 tion of that air into the base of the flame, so that a large quantity of air is directed into the flame at its base. Air also passes through the perforations in the side of the body F into the flame, as indicated by arrows, and 5 other jets of air pass through the crown into the flame above, as also indicated by arrows.

In practice it is found that the air coming to the distributer is effected by the counterdrafts of the body and the crown, so that the I00.

most perfect results will not be attained without some provision to divide the air between the body and the crown. To make such division I introduce into the distributer an inverted-bell shaped concentric partition J, which opens into the central passage, but forms a division between the crown and the body, and so that a portion of the air rising will pass to the side of the body below the partition J, while other portions of the air will pass over the partition J to the perforations in the crown above, and by this partition 'the air is separated into independent currents and avoids conflict between the currents produced by the crown and by the side, the result of which is a very steady flame and with perfect combustion.

I prefer the sleeve 0, as it locates and supports the conical tube in its proper relative position to' flame; but the sleeve 0 may be omitted, the conical tube resting on a shoulder within the central tube, as at d, Fig. 3.

In the larger class of central-draft lamps the tube A is made of sheet metal brought into tubular shape, the edges united by an internal lap-joint, as at 6, Fig. 2. This joint forms a vertical rib upon the inside of the tube A.

In the construction of the sleeve 0, in order to clear the rib e, proj ections f are made in the surface of the sleeve near its lower end of an extent equal to the internal projection of the rib e, the diameter of the sleeve itself bein g such as to readilypass over the rib e. The projections f take a bearing on the surface of the sleeve. The overhanging edge a of the sleeve serves to close the passage which would otherwise exist between the sleeve and the inside of the tube A. The sleeve, however, may be made with a vertical groove 9 on one side corresponding to the rib e, as seen in Fig. 4, which will allow the sleeve to freely pass into the tube A. In this case the external diameter of the sleeve 0 will be substantially that of the internal diameter of the tube A. The sleeve C and the perforated conical tube D, terminating in a distributer at its upper end, may be employed without the perforated crown, the top being simply closed, as indicated in broken lines, Fig. 1.

The distributer, composed of the body F and the receding crown G, with the partition J between, may be employed to advantage Without the conical tube D, air being supplied to the distrib uter through a central tube of less diameter than the distributer, as indicated in broken lines Fig. 1.

I claim- 1. In a central-draft lamp, the combination, with the central tube, of a concentric sleeve 0, removably set in the upper end of said central tube, and a perforated tube D, attached end of said tube A, substantially as de scribed. I

2. In acentral-draft lamp, the combination of the perforated concentric conical tube D, arranged within the central-draft tube, terminating at its upper end in a distributer composed of a perforated body F and perforated crown G, with a concentric partition J' between the said crown and body, substantially as and for the purpose described.

3. In a central-draft lamp, the combination of a conical perforated tube D, arranged concentrically in the central tube, terminating at its upper end in a distributer composed of a body F and crown G, the body F springing from and of larger diameter than the upper end of the conical tube D, the under surface of the said body perforated, the upper edge of the body turned outward to form an annular flange I of larger diameter than the central tube, the crown G receding from the said flange I, and its surface adjacent to the flange perforated, with a concentric partition J between the said crown and body, substantially as described.

4; In a central-draft lamp, the combination of the sleeve 0, adapted to set into the central tube and be supported thereby, a concentric conical tube D, attached by its lower and larger end to the said sleeve below its upper end, the said conical tube terminating in an air-distributer above the upper end of the central tube, the said distributer expanded from the conical tube to form a flange I of larger diameter than the central tube, the sides of the distributer below the said flange perforated, and the distributer above the said flange receding and perforated adjacent to the flange, substantially as described.

5. An air-distributer for central-draft lamps, composed of the body F and the crown G, the body F expanding to form an annular flange I of larger diameter than the central-draft tube, the body perforated below the said flange, the crown Greceding from said flange and forming a series of annular shoulders, each presenting a substantially vertical and horizontal surface, and the said vertical and horizontal surfaces perforated, with a partition J between the said body F and the crown, substantially as and for the purpose described.

6. An air-distributer for central-draft lamps, composed of the body F and the crown G, the

body F expanding to form an annular flange I of larger diameter than the central-draft tube, the body perforated below the said flange, the crown G receding from said flange, and the surface of the said crown adjacent to the flange perforated, with a partition J between the crown and body, substantially as described.

JOSEPH J AUGH.

lVitnesses:

A. E. HALL, F. B. FAIRBANKS. 

